Yeah I was just about to go out and buy a bigger card, but I was wondering if I needed to do something to transfer all my stuff to the new one or if its just a copy and paste job.
Probably not as simple as that, but I should ask just in case.
theres a few steps, nothing hard really, but you will need more than 1gb of free space on your current sd for the emunand backup. (delete a few games if you have to, you can always install them again)
Not sure what your current setup is, but I assume you use ctrbootmanager?
if so, do you already have an entry to get into homebrew loader from there? (it doesnt work if you enter homebrew loader from emunand)
if neither, how does your startup work right now?
Assuming you can enter homebrew loader at startup already:
Download emunand9 homebrew, put it in the 3ds folder of your sd card.
Enter homebrew loader
Start emunand9
Go into Emunand manager Options and select 'dump emunand to emunand.bin'
afterwards, press select to unmount your old sd and put it in your pc
copy all files from old sd to a new folder on your pc
while its copying on your pc, put new and big sd in 3ds
press b and return to the first menu of emunand9.
select 'complete emunand setup' and follow instructions on screen
once thats done, unmount new sd by pressing select again
put new sd into pc (if its already done copying files from the old sd, otherwise, wait till its finished)
Copy all your old sd's files to the new sd which should include a file called emunand.bin.
put in new sd into 3ds again, hit b and go back to emunand manager options.
'clone emunand.bin to emunand'
afterwards, turn off the 3ds, start it up like normally. you can also remove emunand.bin from your sd now (but keep it on your pc for safekeeping)